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Radiation tolerance in the eutardigrade Richtersius coronifer
Lund University.ORCID iD: 0000-0002-1732-0372
Stockholm University, Sweden.
Stockholm University.
2005 (English)In: International Journal of Radiation Biology, ISSN 0955-3002, E-ISSN 1362-3095, Vol. 81, no 9, 649-656 p.Article in journal (Refereed) Published
Abstract [en]

PURPOSE: Tardigrades have a reputation of being extremely tolerant to extreme environmental conditions including tolerance to ionizing radiation while in a desiccated, anhydrobiotic state. However, the evidence for radio-tolerance in tardigrades is based on only one previous report, and there is an obvious need for complementary studies. In this paper we report an investigation on radio-tolerance in desiccated and hydrated specimens of the eutardigrade Richtersius coronifer.

MATERIALS AND METHODS: Groups of 30 - 50 tardigrades were exposed to gamma-radiation at doses between 1.0 - 9.0 (anhydrobiotic animals) or 0.5 - 5.0 (hydrated animals) kGy and the animals were followed until all were dead. Radiation tolerance of both desiccated and hydrated tardigrades was studied.

RESULTS: Both desiccated and hydrated animals irradiated with 0.5 and 1 kGy did not deviate in survival from the control groups. Animals from all exposed groups underwent their moulting and egg production cycle, but at decreasing frequency for doses above 1 kGy. No eggs laid by irradiated animals hatched, while eggs laid by controls did so.

CONCLUSION: Our study suggests that radiation tolerance in tardigrades is not due to biochemical protectants connected with the desiccated state. Rather, cryptobiotic tardigrades may rely on efficient mechanisms of DNA repair, the nature of which is currently unknown.

Place, publisher, year, edition, pages
2005. Vol. 81, no 9, 649-656 p.
Keyword [en]
Tardigrades; anhydrobiosis; resistance; desiccation; DNA damage; DNA repair
National Category
Zoology
Identifiers
URN: urn:nbn:se:hkr:diva-12469DOI: 10.1080/09553000500368453ISI: 000234073800002PubMedID: 16368643OAI: oai:DiVA.org:hkr-12469DiVA: diva2:735590
Available from: 2014-07-29 Created: 2014-07-29 Last updated: 2017-03-13Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
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  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
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Output format
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